1.4.0-dev04

Development build for testing Dymo LetraTag 200B support, see #19.

The Dymo works now. A label comes out the length and the proportions it was drawn at, and a finished print is reported back instead of running into a timeout. A missing cassette cannot be detected, because the printer sends the same reply whether one is in or not.

This build also carries unrelated work that landed on the same branch: a list view with sorting and filters for the overview, rMQR and Data Matrix codes, two pixel fonts for small text, print counts per label, and the new strings in every language. None of that has been through a device test.

Still a debug build on purpose. The calibration values and the BLE logging only exist in one. It installs as "LaBLEr DEBUG" under its own package name, so it sits next to a normal install rather than replacing it.